The correct answer is C, because if necessary, the Development Team is responsible for removing a team member who is creating a hostile environment. The Scrum Guide states that "development Teams are self-organizing. No one (not even the Scrum Master) tells the Development Team how to turn Product Backlog into Increments of potentially releasable functionality." Therefore, the Development Team should manage its own composition and dynamics, and may need help from the Scrum Master to facilitate this process.

The correct answer is E, because any of the above (or others) which are a decomposition of the selected Product Backlog items can be included in the Sprint Backlog. The Scrum Guide states that "the Sprint Backlog is the set of Product Backlog items selected for the Sprint, plus a plan for delivering the product Increment and realizing the Sprint Goal." Therefore, any work items that help the Development Team achieve the Sprint Goal can be part of the Sprint Backlog.

The Scrum Master should ask the person to share the issue with the team as soon as possible, as stated in [5]:
"The Scrum Master should encourage transparency and collaboration within the team and with other stakeholders. If there is a concern about data security issues, it should be brought up to the team and discussed openly. The team can then decide how to handle it, whether by creating a Product Backlog item, updating the definition of "Done", or taking some other action."

According to the Scrum Guide, the Developers on the Scrum Team should write the user documentation, as they are responsible for creating a "Done" Increment that meets the Definition of Done and the Sprint Goal.
The other options are not valid, as they imply that the user documentation can be deferred, ignored, or outsourced, which is not consistent with Scrum values and principles.

The correct answers are A and D, because these ways of creating Development Teams are consistent with Scrum's values. Allowing existing teams to propose how they would like to organize into the new structure respects their self-organization and empowerment. Bringing all the developers together and letting them self- organize into Development Teams also respects their autonomy and collaboration.
References: [Suggested Reading for Professional Scrum Master I]